Currently in the Artist tab in my Library, there are these 5 sorting ways: Most scrobbles, Fewest scrobbles, Alphabetical A-Z, Alphabetical Z-A, Most recent. I'd like to see my list of artist by how mainstream/obscure they are. It would be a nice PRO feature. Also for the "Most recent" sorting, I expected to see artists I just discovered (scrobbling for the first time), but it could be another sorting option.